3 THREE HOUSES BURN IN PITTSBURGH'S FRIENDSHIP NEIGHBORHOOD EARLY THIS MORNING. AND TONIGHT -- THE FIRE IS UNDER INVESTIGATION BY THE CITY'S ARSON SQUAD. NEIGHBORS SPOTTED THE SMOKE AND FLAMES ALONG PENN AVENUE. ACTION NEWS REPORTER JACKIE SCHAFER HAS MORE ON THE DAMAGE LEFT BEHIND. 3 THREE OF THESE VACANT HOMES WERE BURNING.... A TOTAL OF FIVE HOMES WERE IN DANGER ...HERE ALONG PENN AVENUE EARLY THIS MORNING. FIREFIGHTERS HAD TO BREAK IN TO ALL FIVE. LUCKILY NO ONE WAS INSIDE... BUT ONE OF THEIR OWN WAS HURT IN THE FIGHT. 3 ) A FEW HOUSES DOWN, FOLKS HERE HAD TO BE EVACUATED WHILE CREWS KNOCKED OUT THE BLAZE.) A GAPING HOLE IS LEFT BEHIND... WE'RE TOLD THIS HOME WILL BE A TOTAL LOSS -- THEY'RE NOT SURE ABOUT THE OTHERS YET. IN THE MEANTIME, CREWS WILL MONITOR THE HOT SPOTS AND WORK TO FIGURE OUT WHAT STARTED IT 3 ON PENN AVENUE, JACKIE SCHAFER, CHANNEL 4 ACTION NEWS.